Gardening
Forget about planting a back yard survival garden in SHTF, stacking food is the best option.

Bypass the hype. Very, very few people have the skill level to grow enough food calories in a back yard city lot garden feed only themselves for a year. Do you know of anyone who has done it? Probably not. The skill level required is too high to make it happen in a city lot. Too many variables are involved in the food growing process. The best option for city dwellers is to stack food for a SHTF scenario.
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